Agreed, it could be a consequence of the conditions which the plumber had to work with. A basement or ground floor on a slab foundation renovation or new construction on top of ledge. My guess is that there is a sump pump under there.
I've also heard that it is not uncommon for NBA players to have toilets installed on a pedestal or riser of some fashion. More for comfort owing to their height than anything else.
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Probably not that one though.
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Probably not that one though.